configure: WARNING: sys/mount.h: section "Present But Cannot Be
Compiled"
configure: WARNING: sys/mount.h: proceeding with the preprocessor's
result
configure: WARNING: sys/mount.h: in the future, the compiler will
take precedence

configure: WARNING: sys/sysctl.h: section "Present But Cannot Be
Compiled"
configure: WARNING: sys/sysctl.h: proceeding with the preprocessor's
result
configure: WARNING: sys/sysctl.h: in the future, the compiler will
take precedence